Portable extension ramp



FIG. 1 is a front perspective view of a portable extension ramp showingmy new design, the broken lines are for illustrative purposes only andform no part of the claimed design;

FIG. 2 is a right side elevational view thereof, showing the ramp infully closed condition;

FIG. 3 is an enlarged front elevational view thereof;

FIG. 4 is an enlarged rear elevational view thereof;

FIG. 5 is an enlarged right side elevational view thereof, showing theramp in fully extended condition;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The ornamental design for a portable extension ramp, as shown anddescribed.